First of all plug your memory stick or external hard drive in to a USB port on your computer

When you plug the device in, you may get a pop-up window appear offering you various options - you can choose Open folder to view files or follow the next step to see the contents of the drive

To see files already on the device (and to see what name and drive letter is assigned to the device), double click the My Computer (or Computer) icon on your desktop or start menu, you will then see the device under the removable storage section (in this case drive M:)

You can copy files to this device in two ways:-

1) You can right mouse click on the file/folder you want to copy and choose Send to > MEM STICK (M:)